/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2013 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : ICLQt/src/ICLQt/ChromaGUI.h                            **
** Module : ICLQt                                                  **
** Authors: Christof Elbrechter                                    **
**                                                                 **
**                                                                 **
** GNU LESSER GENERAL PUBLIC LICENSE                               **
** This file may be used under the terms of the GNU Lesser General **
** Public License version 3.0 as published by the                  **
**                                                                 **
** Free Software Foundation and appearing in the file LICENSE.LGPL **
** included in the packaging of this file.  Please review the      **
** following information to ensure the license requirements will   **
** be met: http://www.gnu.org/licenses/lgpl-3.0.txt                **
**                                                                 **
** The development of this software was supported by the           **
** Excellence Cluster EXC 277 Cognitive Interaction Technology.    **
** The Excellence Cluster EXC 277 is a grant of the Deutsche       **
** Forschungsgemeinschaft (DFG) in the context of the German       **
** Excellence Initiative.                                          **
**                                                                 **
********************************************************************/

#pragma once

#include <ICLCore/ChromaClassifier.h>
#include <ICLCore/ChromaAndRGBClassifier.h>
#include <ICLQt/SliderHandle.h>
namespace icl{
  namespace qt{
  
    /** \cond */
    class ChromaWidget;
    /** \endcond */
    
    /// Dedicated GUI component which can be used to adjust segmentation parameters \ingroup COMMON
    /** The RG-Chromaticity space is a special Color-Space, which can be used for
        a lighting-independend skin color segmentation. The segmentation is parameterized
        by two parabolic functions \f$P_1(x)\f$ and \f$P_2(x)\f$.
        The pixel classification rule (is pixels skin-colored or not) can be defindes as 
        follows:
        \code
        bool is_pixel_skin_colored(int r,int g,int b, Parable p1, Parable p2){
           int R = (255*r)/(r+g+b+1); // "+1" to avoid a div-zero
           int G = (255*g)/(r+g+b+1);
           return p1(R) > G && p2(R) < G;
        }
        \endcode
        The so called "skin-locus" is defined by the two enclosing parables \f$P_1(x)\f$ and 
        \f$P_2(x)\f$. A pixel is skin colored if it is between the two parables - or more
        precisely: if it is on the bottom side of the first and on the top side of the second.
        
        In addition the ChromaGUI class provides a simple RGB thresholded reference color
        segmenter, which can be combined with the chromaticity-space segmenter, and which 
        can also be adjusted using GUI components.
    **/
    class ICLQt_API ChromaGUI : public QObject, public GUI{
      Q_OBJECT
      public:
      
      /// Create a new ChromaGUI with given parent widget
      ChromaGUI(QWidget *parent=0);
      
      /// retuns a ChomaClassifier with current parameters
      core::ChromaClassifier getChromaClassifier();
  
      /// retuns a CombiClassifier with current parameters
      core::ChromaAndRGBClassifier getChromaAndRGBClassifier();
      
      public Q_SLOTS:
      /// used for the blue-value visualization slider
      void blueSliderChanged(int val);
      
      /// used for the save-button
      void save(const std::string &filename = "");
      
      /// used for the load-button
      void load(const std::string &filename = "");
      
      private:
      /// Wrapped ChromaWidget (an internal class)
      ChromaWidget *m_poChromaWidget;
  
      /// Handles to the embedded sliders
      SliderHandle m_aoSliderHandles[2][3];
      
    };
  } // namespace qt
}